Translation functions seem to work ok but the addon attached long lists onto every post I made on online forums making it unusuable.
Writing a comment like this one would come with about half a page of in-app commands. I only realised it was doing this after someone had told me my post looked different on their screen to mine. When I refreshed a page with a comment I'd written, all of that added text would briefly appear along with my comment and then disappear. Once I removed the app, the writing didn't disappear and so I was seeing what everyone else had been seeing: this long list of crap underneath each post I'd made. Definitely one to avoid if you use any kind of online chat until they fix that issue.